Circuit with slope sensing for driving synchronous rectifier device
AssigneeChengdu Monolithic Power Systems Co., Ltd.
InventorsJiayou Ye, Yuedong Chen, Hui Li
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Abstract
A driving circuit for driving a synchronous rectifier device. The driving circuit may include a controllable charging circuit and a slope sensing circuit. The slope sensing circuit may sense whether an abrupt rising change in a voltage drop from a sensing terminal to a reference ground terminal of the driving circuit is occurring, and provide a slope sensing signal in response to a rising edge of the abrupt rising change in the voltage drop. The controllable charging circuit may receive the slope sensing signal and provide a charging current to a supply terminal of the driving circuit in response to each rising edge of the abrupt rising change in the voltage drop.
Claims20
A driving circuit for driving a synchronous rectifier device, comprising:
- a controllable charging circuit, coupled between a sensing terminal and a supply terminal of the driving circuit, and configured to provide a charging current to the supply terminal in response to a slope sensing signal;
- and
- a slope sensing circuit, coupled between the sensing terminal and a reference ground terminal of the driving circuit, and configured to sense whether an abrupt rising change in a voltage drop from the sensing terminal to the reference ground terminal of the driving circuit is occurring, and further configured to provide the slope sensing signal in response to a rising edge of the abrupt rising change in the voltage drop.
Dependencies are inferred from the claim text.